54.下列有關次級上皮附連(secondary epithelium attachment)之敘述,何者正確?
(A)Attachment of oral epithelium to enamel
(B)Attachment of inner enamel epithelium to enamel surface
(C)Attachment of outer enamel epithelium to enamel surface
(D)Outer enamel epithelium direct contact with inner enamel epithelium